2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 generic device routines.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
30 #include "rt2x00lib.h"
33 * Link tuning handlers
35 void rt2x00lib_reset_link_tuner(struct rt2x00_dev
*rt2x00dev
)
37 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
41 * Reset link information.
42 * Both the currently active vgc level as well as
43 * the link tuner counter should be reset. Resetting
44 * the counter is important for devices where the
45 * device should only perform link tuning during the
46 * first minute after being enabled.
48 rt2x00dev
->link
.count
= 0;
49 rt2x00dev
->link
.vgc_level
= 0;
52 * Reset the link tuner.
54 rt2x00dev
->ops
->lib
->reset_tuner(rt2x00dev
);
57 static void rt2x00lib_start_link_tuner(struct rt2x00_dev
*rt2x00dev
)
60 * Clear all (possibly) pre-existing quality statistics.
62 memset(&rt2x00dev
->link
.qual
, 0, sizeof(rt2x00dev
->link
.qual
));
65 * The RX and TX percentage should start at 50%
66 * this will assure we will get at least get some
67 * decent value when the link tuner starts.
68 * The value will be dropped and overwritten with
69 * the correct (measured )value anyway during the
70 * first run of the link tuner.
72 rt2x00dev
->link
.qual
.rx_percentage
= 50;
73 rt2x00dev
->link
.qual
.tx_percentage
= 50;
75 rt2x00lib_reset_link_tuner(rt2x00dev
);
77 queue_delayed_work(rt2x00dev
->hw
->workqueue
,
78 &rt2x00dev
->link
.work
, LINK_TUNE_INTERVAL
);
81 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev
*rt2x00dev
)
83 cancel_delayed_work_sync(&rt2x00dev
->link
.work
);
87 * Radio control handlers.
89 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
94 * Don't enable the radio twice.
95 * And check if the hardware button has been disabled.
97 if (test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
) ||
98 test_bit(DEVICE_DISABLED_RADIO_HW
, &rt2x00dev
->flags
))
102 * Initialize all data queues.
104 rt2x00queue_init_rx(rt2x00dev
);
105 rt2x00queue_init_tx(rt2x00dev
);
111 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_ON
);
115 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_ON
);
117 rt2x00leds_led_radio(rt2x00dev
, true);
118 rt2x00led_led_activity(rt2x00dev
, true);
120 __set_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
);
125 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
128 * Start the TX queues.
130 ieee80211_wake_queues(rt2x00dev
->hw
);
135 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
137 if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
141 * Stop the TX queues.
143 ieee80211_stop_queues(rt2x00dev
->hw
);
148 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
153 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
154 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
155 rt2x00led_led_activity(rt2x00dev
, false);
156 rt2x00leds_led_radio(rt2x00dev
, false);
159 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
162 * When we are disabling the RX, we should also stop the link tuner.
164 if (state
== STATE_RADIO_RX_OFF
)
165 rt2x00lib_stop_link_tuner(rt2x00dev
);
167 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
170 * When we are enabling the RX, we should also start the link tuner.
172 if (state
== STATE_RADIO_RX_ON
&&
173 (rt2x00dev
->intf_ap_count
|| rt2x00dev
->intf_sta_count
))
174 rt2x00lib_start_link_tuner(rt2x00dev
);
177 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev
*rt2x00dev
)
179 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
180 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
182 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_A
);
184 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_B
);
187 * We are done sampling. Now we should evaluate the results.
189 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_MODE_SAMPLE
;
192 * During the last period we have sampled the RSSI
193 * from both antenna's. It now is time to determine
194 * which antenna demonstrated the best performance.
195 * When we are already on the antenna with the best
196 * performance, then there really is nothing for us
199 if (sample_a
== sample_b
)
202 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
203 rx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
205 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
206 tx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
208 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
211 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev
*rt2x00dev
)
213 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
214 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
215 int rssi_curr
= rt2x00_get_link_ant_rssi(&rt2x00dev
->link
);
216 int rssi_old
= rt2x00_update_ant_rssi(&rt2x00dev
->link
, rssi_curr
);
219 * Legacy driver indicates that we should swap antenna's
220 * when the difference in RSSI is greater that 5. This
221 * also should be done when the RSSI was actually better
222 * then the previous sample.
223 * When the difference exceeds the threshold we should
224 * sample the rssi from the other antenna to make a valid
225 * comparison between the 2 antennas.
227 if (abs(rssi_curr
- rssi_old
) < 5)
230 rt2x00dev
->link
.ant
.flags
|= ANTENNA_MODE_SAMPLE
;
232 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
233 rx
= (rx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
235 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
236 tx
= (tx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
238 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
241 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev
*rt2x00dev
)
244 * Determine if software diversity is enabled for
245 * either the TX or RX antenna (or both).
246 * Always perform this check since within the link
247 * tuner interval the configuration might have changed.
249 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_RX_DIVERSITY
;
250 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_TX_DIVERSITY
;
252 if (rt2x00dev
->hw
->conf
.antenna_sel_rx
== 0 &&
253 rt2x00dev
->default_ant
.rx
== ANTENNA_SW_DIVERSITY
)
254 rt2x00dev
->link
.ant
.flags
|= ANTENNA_RX_DIVERSITY
;
255 if (rt2x00dev
->hw
->conf
.antenna_sel_tx
== 0 &&
256 rt2x00dev
->default_ant
.tx
== ANTENNA_SW_DIVERSITY
)
257 rt2x00dev
->link
.ant
.flags
|= ANTENNA_TX_DIVERSITY
;
259 if (!(rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
) &&
260 !(rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)) {
261 rt2x00dev
->link
.ant
.flags
= 0;
266 * If we have only sampled the data over the last period
267 * we should now harvest the data. Otherwise just evaluate
268 * the data. The latter should only be performed once
271 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_MODE_SAMPLE
)
272 rt2x00lib_evaluate_antenna_sample(rt2x00dev
);
273 else if (rt2x00dev
->link
.count
& 1)
274 rt2x00lib_evaluate_antenna_eval(rt2x00dev
);
277 static void rt2x00lib_update_link_stats(struct link
*link
, int rssi
)
284 if (link
->qual
.avg_rssi
)
285 avg_rssi
= MOVING_AVERAGE(link
->qual
.avg_rssi
, rssi
, 8);
286 link
->qual
.avg_rssi
= avg_rssi
;
289 * Update antenna RSSI
291 if (link
->ant
.rssi_ant
)
292 rssi
= MOVING_AVERAGE(link
->ant
.rssi_ant
, rssi
, 8);
293 link
->ant
.rssi_ant
= rssi
;
296 static void rt2x00lib_precalculate_link_signal(struct link_qual
*qual
)
298 if (qual
->rx_failed
|| qual
->rx_success
)
299 qual
->rx_percentage
=
300 (qual
->rx_success
* 100) /
301 (qual
->rx_failed
+ qual
->rx_success
);
303 qual
->rx_percentage
= 50;
305 if (qual
->tx_failed
|| qual
->tx_success
)
306 qual
->tx_percentage
=
307 (qual
->tx_success
* 100) /
308 (qual
->tx_failed
+ qual
->tx_success
);
310 qual
->tx_percentage
= 50;
312 qual
->rx_success
= 0;
314 qual
->tx_success
= 0;
318 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev
*rt2x00dev
,
321 int rssi_percentage
= 0;
325 * We need a positive value for the RSSI.
328 rssi
+= rt2x00dev
->rssi_offset
;
331 * Calculate the different percentages,
332 * which will be used for the signal.
334 if (rt2x00dev
->rssi_offset
)
335 rssi_percentage
= (rssi
* 100) / rt2x00dev
->rssi_offset
;
338 * Add the individual percentages and use the WEIGHT
339 * defines to calculate the current link signal.
341 signal
= ((WEIGHT_RSSI
* rssi_percentage
) +
342 (WEIGHT_TX
* rt2x00dev
->link
.qual
.tx_percentage
) +
343 (WEIGHT_RX
* rt2x00dev
->link
.qual
.rx_percentage
)) / 100;
345 return (signal
> 100) ? 100 : signal
;
348 static void rt2x00lib_link_tuner(struct work_struct
*work
)
350 struct rt2x00_dev
*rt2x00dev
=
351 container_of(work
, struct rt2x00_dev
, link
.work
.work
);
354 * When the radio is shutting down we should
355 * immediately cease all link tuning.
357 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
363 rt2x00dev
->ops
->lib
->link_stats(rt2x00dev
, &rt2x00dev
->link
.qual
);
364 rt2x00dev
->low_level_stats
.dot11FCSErrorCount
+=
365 rt2x00dev
->link
.qual
.rx_failed
;
368 * Only perform the link tuning when Link tuning
369 * has been enabled (This could have been disabled from the EEPROM).
371 if (!test_bit(CONFIG_DISABLE_LINK_TUNING
, &rt2x00dev
->flags
))
372 rt2x00dev
->ops
->lib
->link_tuner(rt2x00dev
);
375 * Precalculate a portion of the link signal which is
376 * in based on the tx/rx success/failure counters.
378 rt2x00lib_precalculate_link_signal(&rt2x00dev
->link
.qual
);
381 * Send a signal to the led to update the led signal strength.
383 rt2x00leds_led_quality(rt2x00dev
, rt2x00dev
->link
.qual
.avg_rssi
);
386 * Evaluate antenna setup, make this the last step since this could
387 * possibly reset some statistics.
389 rt2x00lib_evaluate_antenna(rt2x00dev
);
392 * Increase tuner counter, and reschedule the next link tuner run.
394 rt2x00dev
->link
.count
++;
395 queue_delayed_work(rt2x00dev
->hw
->workqueue
,
396 &rt2x00dev
->link
.work
, LINK_TUNE_INTERVAL
);
399 static void rt2x00lib_packetfilter_scheduled(struct work_struct
*work
)
401 struct rt2x00_dev
*rt2x00dev
=
402 container_of(work
, struct rt2x00_dev
, filter_work
);
404 rt2x00dev
->ops
->lib
->config_filter(rt2x00dev
, rt2x00dev
->packet_filter
);
407 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
408 struct ieee80211_vif
*vif
)
410 struct rt2x00_dev
*rt2x00dev
= data
;
411 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
412 struct ieee80211_bss_conf conf
;
416 * Copy all data we need during this action under the protection
417 * of a spinlock. Otherwise race conditions might occur which results
418 * into an invalid configuration.
420 spin_lock(&intf
->lock
);
422 memcpy(&conf
, &intf
->conf
, sizeof(conf
));
423 delayed_flags
= intf
->delayed_flags
;
424 intf
->delayed_flags
= 0;
426 spin_unlock(&intf
->lock
);
429 * It is possible the radio was disabled while the work had been
430 * scheduled. If that happens we should return here immediately,
431 * note that in the spinlock protected area above the delayed_flags
432 * have been cleared correctly.
434 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
437 if (delayed_flags
& DELAYED_UPDATE_BEACON
)
438 rt2x00queue_update_beacon(rt2x00dev
, vif
);
440 if (delayed_flags
& DELAYED_CONFIG_ERP
)
441 rt2x00lib_config_erp(rt2x00dev
, intf
, &conf
);
443 if (delayed_flags
& DELAYED_LED_ASSOC
)
444 rt2x00leds_led_assoc(rt2x00dev
, !!rt2x00dev
->intf_associated
);
447 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
449 struct rt2x00_dev
*rt2x00dev
=
450 container_of(work
, struct rt2x00_dev
, intf_work
);
453 * Iterate over each interface and perform the
454 * requested configurations.
456 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
457 rt2x00lib_intf_scheduled_iter
,
462 * Interrupt context handlers.
464 static void rt2x00lib_beacondone_iter(void *data
, u8
*mac
,
465 struct ieee80211_vif
*vif
)
467 struct rt2x00_dev
*rt2x00dev
= data
;
468 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
470 if (vif
->type
!= IEEE80211_IF_TYPE_AP
&&
471 vif
->type
!= IEEE80211_IF_TYPE_IBSS
)
475 * Clean up the beacon skb.
477 rt2x00queue_free_skb(rt2x00dev
, intf
->beacon
->skb
);
478 intf
->beacon
->skb
= NULL
;
480 spin_lock(&intf
->lock
);
481 intf
->delayed_flags
|= DELAYED_UPDATE_BEACON
;
482 spin_unlock(&intf
->lock
);
485 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
487 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
490 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
491 rt2x00lib_beacondone_iter
,
494 schedule_work(&rt2x00dev
->intf_work
);
496 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
498 void rt2x00lib_txdone(struct queue_entry
*entry
,
499 struct txdone_entry_desc
*txdesc
)
501 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
502 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
503 enum data_queue_qid qid
= skb_get_queue_mapping(entry
->skb
);
508 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
511 * Send frame to debugfs immediately, after this call is completed
512 * we are going to overwrite the skb->cb array.
514 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
517 * Update TX statistics.
519 rt2x00dev
->link
.qual
.tx_success
+=
520 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
);
521 rt2x00dev
->link
.qual
.tx_failed
+=
522 test_bit(TXDONE_FAILURE
, &txdesc
->flags
);
525 * Initialize TX status
527 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
528 tx_info
->status
.ack_signal
= 0;
529 tx_info
->status
.excessive_retries
=
530 test_bit(TXDONE_EXCESSIVE_RETRY
, &txdesc
->flags
);
531 tx_info
->status
.retry_count
= txdesc
->retry
;
533 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
534 if (test_bit(TXDONE_SUCCESS
, &txdesc
->flags
))
535 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
536 else if (test_bit(TXDONE_FAILURE
, &txdesc
->flags
))
537 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
540 if (tx_info
->flags
& IEEE80211_TX_CTL_USE_RTS_CTS
) {
541 if (test_bit(TXDONE_SUCCESS
, &txdesc
->flags
))
542 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
543 else if (test_bit(TXDONE_FAILURE
, &txdesc
->flags
))
544 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
548 * Only send the status report to mac80211 when TX status was
549 * requested by it. If this was a extra frame coming through
550 * a mac80211 library call (RTS/CTS) then we should not send the
551 * status report back.
553 if (tx_info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
)
554 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
, entry
->skb
);
556 dev_kfree_skb_irq(entry
->skb
);
559 * Make this entry available for reuse.
564 rt2x00dev
->ops
->lib
->init_txentry(rt2x00dev
, entry
);
566 __clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
567 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
570 * If the data queue was below the threshold before the txdone
571 * handler we must make sure the packet queue in the mac80211 stack
572 * is reenabled when the txdone handler has finished.
574 if (!rt2x00queue_threshold(entry
->queue
))
575 ieee80211_wake_queue(rt2x00dev
->hw
, qid
);
577 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
579 void rt2x00lib_rxdone(struct rt2x00_dev
*rt2x00dev
,
580 struct queue_entry
*entry
)
582 struct rxdone_entry_desc rxdesc
;
584 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
585 struct ieee80211_supported_band
*sband
;
586 struct ieee80211_hdr
*hdr
;
587 const struct rt2x00_rate
*rate
;
588 unsigned int header_size
;
594 * Allocate a new sk_buffer. If no new buffer available, drop the
595 * received frame and reuse the existing buffer.
597 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, entry
);
604 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
607 * Extract the RXD details.
609 memset(&rxdesc
, 0, sizeof(rxdesc
));
610 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
613 * The data behind the ieee80211 header must be
614 * aligned on a 4 byte boundary.
616 header_size
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
617 align
= ((unsigned long)(entry
->skb
->data
+ header_size
)) & 3;
620 skb_push(entry
->skb
, align
);
621 /* Move entire frame in 1 command */
622 memmove(entry
->skb
->data
, entry
->skb
->data
+ align
,
626 /* Update data pointers, trim buffer to correct size */
627 skb_trim(entry
->skb
, rxdesc
.size
);
630 * Update RX statistics.
632 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
633 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
634 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
636 if (((rxdesc
.dev_flags
& RXDONE_SIGNAL_PLCP
) &&
637 (rate
->plcp
== rxdesc
.signal
)) ||
638 (!(rxdesc
.dev_flags
& RXDONE_SIGNAL_PLCP
) &&
639 (rate
->bitrate
== rxdesc
.signal
))) {
646 WARNING(rt2x00dev
, "Frame received with unrecognized signal,"
647 "signal=0x%.2x, plcp=%d.\n", rxdesc
.signal
,
648 !!(rxdesc
.dev_flags
& RXDONE_SIGNAL_PLCP
));
653 * Only update link status if this is a beacon frame carrying our bssid.
655 hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
656 if (ieee80211_is_beacon(hdr
->frame_control
) &&
657 (rxdesc
.dev_flags
& RXDONE_MY_BSS
))
658 rt2x00lib_update_link_stats(&rt2x00dev
->link
, rxdesc
.rssi
);
660 rt2x00dev
->link
.qual
.rx_success
++;
662 rx_status
->mactime
= rxdesc
.timestamp
;
663 rx_status
->rate_idx
= idx
;
665 rt2x00lib_calculate_link_signal(rt2x00dev
, rxdesc
.rssi
);
666 rx_status
->signal
= rxdesc
.rssi
;
667 rx_status
->flag
= rxdesc
.flags
;
668 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
671 * Send frame to mac80211 & debugfs.
672 * mac80211 will clean up the skb structure.
674 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
675 ieee80211_rx_irqsafe(rt2x00dev
->hw
, entry
->skb
, rx_status
);
678 * Replace the skb with the freshly allocated one.
683 rt2x00dev
->ops
->lib
->init_rxentry(rt2x00dev
, entry
);
685 rt2x00queue_index_inc(entry
->queue
, Q_INDEX
);
687 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
690 * Driver initialization handlers.
692 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
694 .flags
= DEV_RATE_CCK
| DEV_RATE_BASIC
,
700 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
| DEV_RATE_BASIC
,
706 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
| DEV_RATE_BASIC
,
712 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
| DEV_RATE_BASIC
,
718 .flags
= DEV_RATE_OFDM
| DEV_RATE_BASIC
,
724 .flags
= DEV_RATE_OFDM
,
730 .flags
= DEV_RATE_OFDM
| DEV_RATE_BASIC
,
736 .flags
= DEV_RATE_OFDM
,
742 .flags
= DEV_RATE_OFDM
| DEV_RATE_BASIC
,
748 .flags
= DEV_RATE_OFDM
,
754 .flags
= DEV_RATE_OFDM
,
760 .flags
= DEV_RATE_OFDM
,
767 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
768 const int channel
, const int tx_power
,
771 entry
->center_freq
= ieee80211_channel_to_frequency(channel
);
772 entry
->hw_value
= value
;
773 entry
->max_power
= tx_power
;
774 entry
->max_antenna_gain
= 0xff;
777 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
778 const u16 index
, const struct rt2x00_rate
*rate
)
781 entry
->bitrate
= rate
->bitrate
;
782 entry
->hw_value
= rt2x00_create_rate_hw_value(index
, 0);
783 entry
->hw_value_short
= entry
->hw_value
;
785 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
) {
786 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
787 entry
->hw_value_short
|= rt2x00_create_rate_hw_value(index
, 1);
791 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
792 struct hw_mode_spec
*spec
)
794 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
795 struct ieee80211_channel
*channels
;
796 struct ieee80211_rate
*rates
;
797 unsigned int num_rates
;
799 unsigned char tx_power
;
802 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
804 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
807 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
811 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
813 goto exit_free_channels
;
816 * Initialize Rate list.
818 for (i
= 0; i
< num_rates
; i
++)
819 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
822 * Initialize Channel list.
824 for (i
= 0; i
< spec
->num_channels
; i
++) {
825 if (spec
->channels
[i
].channel
<= 14) {
826 if (spec
->tx_power_bg
)
827 tx_power
= spec
->tx_power_bg
[i
];
829 tx_power
= spec
->tx_power_default
;
831 if (spec
->tx_power_a
)
832 tx_power
= spec
->tx_power_a
[i
];
834 tx_power
= spec
->tx_power_default
;
837 rt2x00lib_channel(&channels
[i
],
838 spec
->channels
[i
].channel
, tx_power
, i
);
842 * Intitialize 802.11b, 802.11g
846 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
847 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
848 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
849 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
850 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
851 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
852 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
856 * Intitialize 802.11a
858 * Channels: OFDM, UNII, HiperLAN2.
860 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
861 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
862 spec
->num_channels
- 14;
863 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
865 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
866 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
867 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
868 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
875 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
879 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
881 if (test_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
))
882 ieee80211_unregister_hw(rt2x00dev
->hw
);
884 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
885 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
886 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
887 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
888 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
892 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
894 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
898 * Initialize HW modes.
900 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
905 * Initialize HW fields.
907 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
912 status
= ieee80211_register_hw(rt2x00dev
->hw
);
914 rt2x00lib_remove_hw(rt2x00dev
);
918 __set_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
);
924 * Initialization/uninitialization handlers.
926 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
928 if (!__test_and_clear_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
932 * Unregister extra components.
934 rt2x00rfkill_unregister(rt2x00dev
);
937 * Allow the HW to uninitialize.
939 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
942 * Free allocated queue entries.
944 rt2x00queue_uninitialize(rt2x00dev
);
947 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
951 if (test_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
955 * Allocate all queue entries.
957 status
= rt2x00queue_initialize(rt2x00dev
);
962 * Initialize the device.
964 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
966 rt2x00queue_uninitialize(rt2x00dev
);
970 __set_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
);
973 * Register the extra components.
975 rt2x00rfkill_register(rt2x00dev
);
980 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
984 if (test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
988 * If this is the first interface which is added,
989 * we should load the firmware now.
991 retval
= rt2x00lib_load_firmware(rt2x00dev
);
996 * Initialize the device.
998 retval
= rt2x00lib_initialize(rt2x00dev
);
1005 retval
= rt2x00lib_enable_radio(rt2x00dev
);
1007 rt2x00lib_uninitialize(rt2x00dev
);
1011 rt2x00dev
->intf_ap_count
= 0;
1012 rt2x00dev
->intf_sta_count
= 0;
1013 rt2x00dev
->intf_associated
= 0;
1015 __set_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1016 __set_bit(DEVICE_DIRTY_CONFIG
, &rt2x00dev
->flags
);
1021 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
1023 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1027 * Perhaps we can add something smarter here,
1028 * but for now just disabling the radio should do.
1030 rt2x00lib_disable_radio(rt2x00dev
);
1032 rt2x00dev
->intf_ap_count
= 0;
1033 rt2x00dev
->intf_sta_count
= 0;
1034 rt2x00dev
->intf_associated
= 0;
1036 __clear_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1040 * driver allocation handlers.
1042 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
1044 int retval
= -ENOMEM
;
1047 * Make room for rt2x00_intf inside the per-interface
1048 * structure ieee80211_vif.
1050 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
1053 * Let the driver probe the device to detect the capabilities.
1055 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1057 ERROR(rt2x00dev
, "Failed to allocate device.\n");
1062 * Initialize configuration work.
1064 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
1065 INIT_WORK(&rt2x00dev
->filter_work
, rt2x00lib_packetfilter_scheduled
);
1066 INIT_DELAYED_WORK(&rt2x00dev
->link
.work
, rt2x00lib_link_tuner
);
1069 * Allocate queue array.
1071 retval
= rt2x00queue_allocate(rt2x00dev
);
1076 * Initialize ieee80211 structure.
1078 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1080 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
1085 * Register extra components.
1087 rt2x00leds_register(rt2x00dev
);
1088 rt2x00rfkill_allocate(rt2x00dev
);
1089 rt2x00debug_register(rt2x00dev
);
1091 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1096 rt2x00lib_remove_dev(rt2x00dev
);
1100 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1102 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1104 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1109 rt2x00lib_disable_radio(rt2x00dev
);
1112 * Uninitialize device.
1114 rt2x00lib_uninitialize(rt2x00dev
);
1117 * Free extra components
1119 rt2x00debug_deregister(rt2x00dev
);
1120 rt2x00rfkill_free(rt2x00dev
);
1121 rt2x00leds_unregister(rt2x00dev
);
1124 * Free ieee80211_hw memory.
1126 rt2x00lib_remove_hw(rt2x00dev
);
1129 * Free firmware image.
1131 rt2x00lib_free_firmware(rt2x00dev
);
1134 * Free queue structures.
1136 rt2x00queue_free(rt2x00dev
);
1138 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1141 * Device state handlers
1144 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1148 NOTICE(rt2x00dev
, "Going to sleep.\n");
1149 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1152 * Only continue if mac80211 has open interfaces.
1154 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1156 __set_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
);
1161 rt2x00lib_stop(rt2x00dev
);
1162 rt2x00lib_uninitialize(rt2x00dev
);
1165 * Suspend/disable extra components.
1167 rt2x00leds_suspend(rt2x00dev
);
1168 rt2x00debug_deregister(rt2x00dev
);
1172 * Set device mode to sleep for power management,
1173 * on some hardware this call seems to consistently fail.
1174 * From the specifications it is hard to tell why it fails,
1175 * and if this is a "bad thing".
1176 * Overall it is safe to just ignore the failure and
1177 * continue suspending. The only downside is that the
1178 * device will not be in optimal power save mode, but with
1179 * the radio and the other components already disabled the
1180 * device is as good as disabled.
1182 retval
= rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
);
1184 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
1185 "continue suspending.\n");
1189 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1191 static void rt2x00lib_resume_intf(void *data
, u8
*mac
,
1192 struct ieee80211_vif
*vif
)
1194 struct rt2x00_dev
*rt2x00dev
= data
;
1195 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
1197 spin_lock(&intf
->lock
);
1199 rt2x00lib_config_intf(rt2x00dev
, intf
,
1200 vif
->type
, intf
->mac
, intf
->bssid
);
1204 * Master or Ad-hoc mode require a new beacon update.
1206 if (vif
->type
== IEEE80211_IF_TYPE_AP
||
1207 vif
->type
== IEEE80211_IF_TYPE_IBSS
)
1208 intf
->delayed_flags
|= DELAYED_UPDATE_BEACON
;
1210 spin_unlock(&intf
->lock
);
1213 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1217 NOTICE(rt2x00dev
, "Waking up.\n");
1220 * Restore/enable extra components.
1222 rt2x00debug_register(rt2x00dev
);
1223 rt2x00leds_resume(rt2x00dev
);
1226 * Only continue if mac80211 had open interfaces.
1228 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
))
1232 * Reinitialize device and all active interfaces.
1234 retval
= rt2x00lib_start(rt2x00dev
);
1239 * Reconfigure device.
1241 retval
= rt2x00mac_config(rt2x00dev
->hw
, &rt2x00dev
->hw
->conf
);
1246 * Iterator over each active interface to
1247 * reconfigure the hardware.
1249 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
1250 rt2x00lib_resume_intf
, rt2x00dev
);
1253 * We are ready again to receive requests from mac80211.
1255 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1258 * It is possible that during that mac80211 has attempted
1259 * to send frames while we were suspending or resuming.
1260 * In that case we have disabled the TX queue and should
1261 * now enable it again
1263 ieee80211_wake_queues(rt2x00dev
->hw
);
1266 * During interface iteration we might have changed the
1267 * delayed_flags, time to handles the event by calling
1268 * the work handler directly.
1270 rt2x00lib_intf_scheduled(&rt2x00dev
->intf_work
);
1275 rt2x00lib_disable_radio(rt2x00dev
);
1276 rt2x00lib_uninitialize(rt2x00dev
);
1277 rt2x00debug_deregister(rt2x00dev
);
1281 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1282 #endif /* CONFIG_PM */
1285 * rt2x00lib module information.
1287 MODULE_AUTHOR(DRV_PROJECT
);
1288 MODULE_VERSION(DRV_VERSION
);
1289 MODULE_DESCRIPTION("rt2x00 library");
1290 MODULE_LICENSE("GPL");